13122666 has 12 divisors (see below), whose sum is σ = 28432482. Its totient is φ = 4374216.

The previous prime is 13122653. The next prime is 13122671. The reversal of 13122666 is 66622131.

It can be written as a sum of positive squares in only one way, i.e., 13111641 + 11025 = 3621^2 + 105^2 .

It is a nude number because it is divisible by every one of its digits.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 364501 + ... + 364536.

Almost surely, 2^13122666 is an apocalyptic number.

13122666 is an abundant number, since it is smaller than the sum of its proper divisors (15309816).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13122666 is a wasteful number, since it uses less digits than its factorization.

13122666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729045 (or 729042 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 13122666 is about 3622.5220496223. The cubic root of 13122666 is about 235.8707158406.

Adding to 13122666 its reverse (66622131), we get a palindrome (79744797).

The spelling of 13122666 in words is "thirteen million, one hundred twenty-two thousand, six hundred sixty-six".